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Area of rectangle = Length x Breadth
A = lb
We all normally calculate how tall the building or the size of a swimming pool and
how deep it is.
What is the area of a rectangular object, how to find out the area of the rectangle?

The area of any rectangle is calculated once its length and width are known. By
multiplying length and breadth, the rectangle’s area will obtain in square-units
dimension.

Example 1: Find the area of the rectangle whose length is 15 cm and the width
is 4 cm?
Solution:
Given,

Length = 15 cm
Width = 4 cm

Area of a rectangle = Length × Width
15 × 4 = 60
2
So the area of rectangle = 60 cm
Example 2: Find the area of a rectangular blackboard whose length and
breadth are 120 cm and 100 cm respectively.

Solution:
Length of the blackboard = 120 cm = 1.2 m
Breadth of the blackboard = 100 cm = 1 m

Area of the blackboard = area of a rectangle = length x breadth = 1.2 m x 1 m = 1.2
square-metres